Table 2.

Comparison of Chesapeake Bay Nitrogen Fluxes (10⁹ g N yr⁻¹)

		Historical Estimates (1975–1990)	DLEM‐ROMS‐ECB Modela (2001–2005)
Total nitrogen input from river		134b
DIN		84 ± 26c	96 ± 50
TON		38 ± 7c	58 ± 22
Burial	stem + tributaries	53b	46 ± 10
	stem	21d	22 ± 4
Denitrificatione	stem + tributaries	40b	34 ± 10
	stem	23d	22 ± 9
Net ecosystem productionf		54d	74 ± 23
Total nitrogen export to ocean
DIN		3d	8 ± 8
TON		78d	91 ± 36

^aFrom this study.

^bFrom data‐derived estimates of Boynton et al. [1995].

^cDLEM estimates based on 1980–1990 periods.

^dFrom data‐derived estimates of Kemp et al. [1997].

^eIncludes both water column and sediment denitrification.

^fCalculated from TON budget.